Houston released the 30-year-old Chacin earlier this week. He appeared in 44 games for the Astros last year, posting a 4.70 ERA with 7.3 K/9 and 4.7 BB/9 and homering in his lone at bat for Houston. He had a 5.13 ERA with 5.0 K/9 and 3.2 BB/9 in 66 2/3 innings for the Astros' Triple-A affiliate this year.